HZSM-5/AlPO_4-5复合分子筛的合成及其甲苯甲醇烷基化择形催化性能研究  

Synthesis of HZSM-5/AlPO_4-5 cmposite molecular sieves and their selective catalytic performance in alkylation of toluene with methanol

作　　者：温少波[1,2] 张瑞珍[1,2] 赵欣[1,2] 王志翔[1,2] 张燃坤 韩培德[1,2] 赵亮富[3] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]新材料界面科学与工程教育部重点实验室,山西太原030024 [3]中国科学院山西煤炭化学研究所,山西太原030001

出　　处：《天然气化工—C1化学与化工》2016年第6期21-24,共4页Natural Gas Chemical Industry

基　　金：国家自然科学基金(批准号:51371123);山西省基础研究项目(批准号:2014011002-1)资助

摘　　要：采用水热法在AlPO_4-5的合成母液中引入HZSM-5,制备了一系列不同固液比、不同晶化时间的HZSM-5/AlPO_4-5复合分子筛,采用XRD、SEM、FT-IR和NH3-TPD等手段对分子筛的微观结构进行表征,考察其在甲苯甲醇烷基化催化中的活性。结果表明:在固液比为1g/30m L、晶化时间72h的HZSM-5/AlPO_4-5复合分子筛结晶度以及壳层致密度较高,外表面强酸量较小,与HZSM-5分子筛相比,对二甲苯选择性明显提高。HZSM-5/AlPO4-5 composite molecular sieves were synthesized by using hydrothennal method and introducing HZSM- 5 as core materials to mother liquid of AlPO4-5 under different solid to liquid ratios and crystallizing time, and characterized by XRD, SEM, FT-IR and NH3-TPD. Catalytic performances of the HZSM-5/AlPO4-5 catalysts for alkylation of toluene with methanol were investigated. The results show that HZSM-5/AlPO4-5 composite molecular sieves with high crystallinity could be obtained when the ratio of solid to liquid is 1 g to 30 mL and the crystallizing time is 72h, and the selectivity of p-xylene over the HZSM-5/AlPO4-5 was obviouly higher than that over the pure HZSM-5.

关 键 词：HZSM-5/Al PO4-5复合分子筛 甲苯 甲醇 烷基化 对二甲苯 

分 类 号：O643.3[理学—物理化学] TQ426.94[理学—化学]